#include <bits/stdc++.h>
using namespace std;
int main(){
	int n,i,j,m,k,a,ss=0;
	cin>>n>>m>>k;
	int s[100][100]={0};
	for(i=0;i<n;i++){
		a=0;
		for(j=0;j<m;j++){
			cin>>s[i][j];
			a+=s[i][j];			
		}
		if(a>=k)
			ss++;
	}
	cout<<ss;
		
	return 0;
	}

/**************************************************************
	Problem: 2026
	User: fzy001
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/